package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Objects;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;
    @Override
    //新增菜品
    @Transactional//因为要操作两张表，进行回滚，要么同时成功要么同时失败
    public void saveWithFlavir(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入1条数据

        dishMapper.insert(dish);
        Long dishId=dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        System.out.println(flavors);
        if (flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    //菜品分页查询
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        System.out.println(page);
        long total=page.getTotal();
        List<DishVO> records=page.getResult();
        return new PageResult(total,records);
    }

    @Override
    @Transactional
    public void del(List<Long> ids) {
        // 判断当前菜品是否能够删除---是否存在起售中的菜品？？
        for (Long id:ids) {
            Dish dish = dishMapper.chaxunById(id);
            if (Objects.equals(dish.getStatus(), StatusConstant.ENABLE)) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        // 判断当前菜品是否能够删除---是否被套餐关联了？？
        List<Long> setMealIds=setMealDishMapper.getSetmealIdsByDishIds(ids);
        if (setMealIds !=null && setMealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        // 删除菜品表中的菜品数据
        for (Long id:ids){
            dishMapper.deleteById(id);

        // 删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
    }}

    //根据Id查询菜品
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        // 根据id查询菜品数据
        Dish dish=dishMapper.chaxunById(id);
        // 根据菜品id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        // 将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        // 修改菜品表基本信息
        dishMapper.update(dish);

        // 删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        // 重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            // 向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override
    //菜品启售停售
    public void startOrStop(Integer status, Long id) {
        Dish dish=dishMapper.chaxunById(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }
}

